The Dolmabahçe Palace is a historical palace located in Istanbul, Turkey. It was built in the mid-19th century by the Ottoman sultan Abdülmecid I as a replacement for the Topkapi Palace, which had been the primary residence of the Ottoman sultans for nearly 400 years.

Construction of the Dolmabahçe Palace began in 1843 and was completed in 1856. The palace was designed by the Ottoman architect Garabet Balyan and his sons Nigoğayos, Hagop, and Simeon, who were members of a prominent Armenian family of architects. 

The palace is a massive, ornate building with 285 rooms, 43 halls, and 6 baths. It is decorated with marble, crystal, gold, and other luxurious materials and is filled with works of art and other treasures worldwide.

The Dolmabahçe Palace was the primary residence of the Ottoman sultans from 1856 until the end of the Ottoman Empire in 1922. 

It was also used for state occasions and as a reception centre for visiting dignitaries. Today, the Dolmabahçe Palace is a significant tourist attraction in Istanbul and is open to the public as a museum. It is a UNESCO World Heritage Site.